TWI720722B - Touch electrode structure and capactive touch system - Google Patents

Abstract

A touch electrode structure and a capacitive touch system are disclosed. The touch electrode structure includes: a substrate; a plurality of first electrode series each including a plurality of first electrodes; a plurality of second electrode series each including a plurality of second electrodes; and at least one connecting wire. Each of the second electrode series includes at least one electrode group, and the at least one electrode group includes two of the second electrodes. The two of the second electrodes are electrically connected on a first surface of the substrate, and at least one of the two of the second electrodes is electrically connected to one of the second electrodes adjacent to the at least one of the two of the second electrodes.

Description

Touch control electrode structure and capacitive touch control system

This disclosure relates to the field of touch technology, and particularly relates to a touch electrode structure and a capacitive touch system.

In a capacitive touch system, a plurality of touch electrodes are used to sense touch signals or floating signals on a touch panel. The touch electrodes include a plurality of driving electrodes and a plurality of sensing electrodes. The driving electrodes and the sensing electrodes are formed on a substrate. When the substrate includes four-layer circuits, the substrate is a four-layer board. When the substrate includes a two-layer circuit, the substrate is a two-layer board.

Due to the large number of touch electrodes, it is necessary to use vias and connecting wires to connect adjacent touch electrodes. When the substrate is a two-layer board, the vias and connecting wires can only be formed on one surface of the substrate. Occupies too much space on the substrate, resulting in a reduction in the space used by the substrate.

Therefore, it is necessary to propose a solution to the above-mentioned conventional technology problems.

The present disclosure provides a touch electrode structure and a capacitive touch system, which can solve the problems in the prior art.

The touch electrode structure of the present disclosure includes: a substrate; a plurality of first electrode series are formed on a first surface of the substrate along a first direction, and each of the first electrode series includes a plurality of first electrodes. Electrodes; a plurality of second electrode series are formed on the first surface of the substrate along a second direction, each of the second electrode series includes a plurality of second electrodes; and at least one connecting line is formed in the On a second surface of the substrate, wherein each of the second electrode series includes at least one electrode group, the at least one electrode group includes two second electrodes, and the two second electrodes are on the first surface of the substrate The upper part is electrically connected, and at least one of the two second electrodes is electrically connected to the second electrode adjacent to the at least one of the two second electrodes through the at least one connecting wire.

The capacitive touch system of the present disclosure includes: a touch panel and a touch detection unit. The touch electrode structure includes: a substrate; a plurality of first electrode series formed on a first surface of the substrate along a first direction, and each of the first electrode series includes a plurality of first electrodes; A plurality of second electrode series are formed on the first surface of the substrate along a second direction, each of the second electrode series includes a plurality of second electrodes; and at least one connection line is formed on the substrate On a second surface, each of the second electrode series includes at least one electrode group, the at least one electrode group includes two second electrodes, and the two second electrodes are on the first surface of the substrate. It is electrically connected, and at least one of the two second electrodes is electrically connected to a second electrode adjacent to the at least one of the two second electrodes through the at least one connecting wire. The touch detection unit is electrically connected to the touch electrode structure and used for detecting a touch signal or a floating signal on the touch electrode structure.

In the touch electrode structure and capacitive touch system of the present disclosure, since at least one electrode group in each of the second electrode series includes two electrically connected second electrodes, two of the at least one group There is no need for connecting wires between the second electrodes, and the number of connecting wires and the number of via holes can be saved, so that the available space on the second surface of the substrate is increased. In addition, the present disclosure provides a variety of second electrode patterns, which can achieve the advantages of simple circuit layout or increased touch accuracy and linearity.

In order to make the objectives, technical solutions, and effects of the present disclosure clearer and clearer, the following further describes the present disclosure in detail with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure, and the word "embodiment" used in the specification of the present disclosure means serving as an example, example, or illustration, and is not intended to limit the present disclosure. In addition, the article "a" used in the scope of this disclosure and the appended application can generally be interpreted as meaning "one or more" unless otherwise specified or the singular form can be clearly determined from the context. In addition, in the accompanying drawings, elements with similar or identical structures and functions are denoted by the same element numbers.

Please refer to FIG. 1, which shows a schematic diagram of a touch electrode structure according to an embodiment of the present disclosure.

The touch electrode structure includes a substrate 10, a plurality of first electrode series Y1-Y8, a plurality of second electrode series X1-X5, and at least one connecting wire 20 (the first figure shows a plurality of connecting wires 20).

The substrate 10 is a two-layer board. More specifically, circuits and related components are only formed on two surfaces of the substrate 10. The first electrode series Y1-Y8 are formed on a first surface (for example, the lower surface) of the substrate 10 along a first direction, and each of the first electrode series Y1-Y8 includes a plurality of first electrodes 30. It should be noted that since all the first electrodes 30 have the same shape and no insulating material is formed between adjacent first electrodes 30, each of the first electrode series Y1-Y8 is shown as a long strip in Figure 1. shape.

The second electrode series X1-X5 are formed on the first surface of the substrate 10 along a second direction, and each of the second electrode series X1-X5 includes a plurality of second electrodes 40. The first direction is different from the second direction. In this embodiment, the first direction is perpendicular to the second direction. The connecting wires 20 are formed on a second surface (for example, the upper surface) of the substrate 10.

The first electrode series Y1-Y8 and the second electrode series X1-X5 are electrically insulated from each other. The adjacent first electrode series Y1-Y8 are electrically insulated from each other. All the first electrodes 30 in the same first electrode series are electrically connected on the first surface of the substrate 10. In other words, all the first electrodes 30 in the first electrode series Y1 are electrically connected on the first surface of the substrate 10. All the first electrodes 30 in the first electrode series Y2 are electrically connected on the first surface of the substrate 10. All the first electrodes 30 in each of the first electrode series Y3-Y8 are electrically connected on the first surface of the substrate 10.

The adjacent second electrode series X1-X5 are electrically insulated from each other. Each of the second electrode series X1-X5 includes at least one electrode group, the at least one electrode group includes two adjacent (continuous) second electrodes 40, and the two second electrodes 40 are located between the substrate 10 The first surface is electrically connected, and at least one of the two second electrodes 40 is electrically connected to the second electrode 40 adjacent to the at least one of the two second electrodes 40 through the connecting wire 20.

For example, the second electrode series X1 includes eight second electrodes 40 and four electrode groups 400-406. The electrode group 400 includes two adjacent (continuous) second electrodes 40, and the two second electrodes 40 The two electrodes 40 are electrically connected on the first surface of the substrate 10, and the second electrode 40 on the right is electrically connected to the second electrode 40 adjacent to the second electrode 40 on the right through the connecting wire 20.

The electrode group 402 includes two adjacent (continuous) second electrodes 40. The two second electrodes 40 are electrically connected on the first surface of the substrate 10, and the two second electrodes 40 are connected by a connecting wire. 20 is electrically connected to the second electrode 40 adjacent to the two second electrodes 40.

The electrode set 404 includes two adjacent (continuous) second electrodes 40. The two second electrodes 40 are electrically connected on the first surface of the substrate 10, and the two second electrodes 40 are connected by a connecting wire. 20 is electrically connected to the second electrode 40 adjacent to the two second electrodes 40.

The electrode group 406 includes two adjacent (continuous) second electrodes 40. The two adjacent second electrodes 40 are electrically connected on the first surface of the substrate 10, and the second electrode 40 is located on the left side. The connecting wire 20 is electrically connected to the second electrode 40 adjacent to the second electrode 40 on the left side.

In short, the electrode group 400 (formed on the first surface of the substrate 10) and the electrode group 402 (formed on the first surface of the substrate 10) are electrically disconnected, so the connecting wire 20 (formed on the The second surface of the substrate 10 is electrically connected to the electrode group 400 (formed on the first surface of the substrate 10) and the electrode group 402 (formed on the first surface of the substrate 10). The electrode group 402 (formed on the first surface of the substrate 10) and the electrode group 404 (formed on the first surface of the substrate 10) are electrically disconnected. Therefore, it is necessary to use the connecting wire 20 (formed on the second surface of the substrate 10). The surface is electrically connected to the electrode group 402 (formed on the first surface of the substrate 10) and the electrode group 404 (formed on the first surface of the substrate 10). The electrode group 404 (formed on the first surface of the substrate 10) and the electrode group 406 (formed on the first surface of the substrate 10) are electrically disconnected. Therefore, it is necessary to use the connecting wire 20 (formed on the second surface of the substrate 10). The surface is electrically connected to the electrode group 404 (formed on the first surface of the substrate 10) and the electrode group 406 (formed on the first surface of the substrate 10).

In the prior art, the adjacent second electrodes in the same second electrode series are electrically disconnected from each other, so a connecting wire is required to electrically connect the adjacent second electrodes. In the touch electrode structure of the present disclosure, each of the second electrode series X1-X5 includes at least one electrode group, and the at least one electrode group includes two electrically connected second electrodes 40, so the at least one group There is no need for connecting wires 20 between the two second electrodes 40, so the number of connecting wires 20 can be saved.

In this embodiment, each of the second electrode series X1-X5 includes four electrode groups 402-406. Therefore, each of the second electrode series X1-X5 can reduce four connecting lines 20, thereby reducing the The connecting wires 20 occupy the space on the second surface of the substrate 10. Furthermore, the number of electrode groups included in each of the second electrode series X1-X5 is not limited, as long as at least one group is included, the purpose of reducing the number of connecting wires 20 can be achieved.

Each of the connecting wires 20 electrically connects adjacent second electrodes 40 through vias (not shown). The via hole penetrates the first surface and the second surface of the substrate 10. As the number of connecting wires 20 is reduced, the number of vias can also be reduced, so the space occupied by vias on the second surface of the substrate 10 can be reduced.

Please refer to FIG. 2. FIG. 2 shows an enlarged view of the electrode group 400 according to FIG. 1.

The electrode group 400 includes two second electrodes 40. The two second electrodes 40 are rectangular and electrically connected through a connecting portion 42 between the second electrodes 40. Since the two second electrodes 40 are rectangular, the advantage of the touch electrode structure in FIG. 1 is that the circuit layout is simple.

In this embodiment, the first electrodes 30 are driving electrodes, and the second electrodes 40 are sensing electrodes. In another embodiment, the first electrodes 30 are sensing electrodes, and the second electrodes 40 are driving electrodes. The touch sensing method of the driving electrode and the sensing electrode is well-known to those with ordinary knowledge in the technical field of the present disclosure, and will not be repeated here.

Please refer to FIG. 3, which shows a schematic diagram of a touch electrode structure according to another embodiment of the present disclosure.

The touch electrode structure includes a substrate 10', a plurality of first electrode series Y1'-Y8', a plurality of second electrode series X1'-X5', and at least one connecting wire 20' (Figure 3 shows a plurality of Connecting wire 20').

The substrate 10' is a two-layer board. More specifically, circuits and related components are only formed on the two surfaces of the substrate 10'. The first electrode series Y1'-Y8' include a plurality of first electrodes 30'.

The second electrode series X1'-X5' include a plurality of second electrodes 40'. The connecting wires 20' are formed on a second surface of the substrate 10'.

For the parts that are not described in this embodiment, please refer to the related description in FIG. 1, and will not be repeated here.

The difference between this embodiment and the embodiment in FIG. 1 is that the second electrode 40' of this embodiment and the second electrode 40 in FIG. 1 have different shapes.

Please refer to Fig. 4, which shows an enlarged view of the electrode group according to Fig. 3.

The electrode group includes two second electrodes 40', and the two second electrodes 40' respectively include a first triangular portion 42', a second triangular portion 44', and a connecting portion 46'. The shape of the first triangular portion 42' is opposite to the shape of the second triangular portion 44', the connecting portion 46' is a straight line, and the first triangular portion 42' and the second triangular portion 44' pass through the connecting portion 46' Electrical connection. The advantage of the touch electrode structure in Figure 4 is that it can increase touch accuracy and linearity.

Please refer to FIG. 5, which shows a schematic diagram of a touch electrode structure according to another embodiment of the present disclosure.

The touch electrode structure includes a substrate 10", a plurality of first electrode series Y1"-Y8", a plurality of second electrode series X1"-X5", and at least one connecting wire 20" ( Figure 5 shows multiple connecting lines 20").

The substrate 10'' is a two-layer board. More specifically, circuits and related components are only formed on both surfaces of the substrate 10''. The first electrode series Y1''-Y8'' include a plurality of first electrodes 30''.

The second electrode strings X1'-X5'' include a plurality of second electrodes 40''. The connecting wires 20'' are formed on a second surface of the substrate 10'.

For the parts that are not described in this embodiment, please refer to the related description in FIG. 1, and will not be repeated here.

The difference between this embodiment and the embodiment in FIG. 1 is that the second electrode 40'' of this embodiment and the second electrode 40 in FIG. 1 have different shapes.

Please refer to Fig. 6, which shows an enlarged view of the electrode group according to Fig. 5.

The electrode group includes two second electrodes 40'', and the two second electrodes 40'' respectively include a first triangular portion 42'', a second triangular portion 44'', and a connecting portion 46''. The shape of the first triangle portion 42" is opposite to the shape of the second triangle portion 44", the connecting portion 46" is a rhombus, the first triangle portion 42" and the second triangle portion 44" It is electrically connected through the connecting portion 46". The advantage of the touch electrode structure in Figure 6 is that it can increase touch accuracy and linearity.

Please refer to FIG. 7, which shows a schematic diagram of a capacitive touch system according to an embodiment of the present disclosure.

The capacitive touch system includes a touch panel 70 and a touch detection unit 72.

The touch panel 70 includes a touch electrode structure. For the touch electrode structure, please refer to the related description in FIG. 5, which will not be repeated here. It should be noted that the touch electrode structure can also adopt the embodiment shown in FIG. 1 or FIG. 3.

The touch detection unit 72 is electrically connected to the touch electrode structure and used for detecting a touch signal or a hovering signal on the touch electrode structure.

In the touch electrode structure and capacitive touch system of the present disclosure, since at least one electrode group in each of the second electrode series includes two electrically connected second electrodes, two of the at least one group There is no need for connecting wires between the second electrodes, and the number of connecting wires and the number of via holes can be saved, so that the available space on the second surface of the substrate is increased. In addition, the present disclosure provides a variety of second electrode patterns, which can achieve the advantages of simple circuit layout or increased touch accuracy and linearity.

Although the present disclosure has been disclosed as above in the preferred embodiments, it is not intended to limit the present disclosure. Those with ordinary knowledge in the technical field of the present disclosure can make various changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the protection scope of this disclosure shall be subject to those defined by the attached patent application scope.

10, 10’, 10’’: substrate 20, 20’, 20’’: connecting line 30, 30’, 30’’: first electrode 40, 40’, 40’’: second electrode 42, 46’, 46’’: connecting part 42’, 42’’: the first triangle 44’, 44’’: The second triangle 400-406: Electrode group X1-X5, X1’-X5’, X1’’-X5’’: the second electrode series Y1-Y8, Y1’-Y8’, Y1’’-Y8’’: first electrode series 70: Touch panel 70: Touch detection unit

[Figure 1] A schematic diagram showing a touch electrode structure according to an embodiment of the present disclosure. [Figure 2] An enlarged view showing the electrode group according to Figure 1. [FIG. 3] A schematic diagram showing a touch electrode structure according to another embodiment of the present disclosure. [Fig. 4] An enlarged view showing the electrode group according to Fig. 3. [Figure 5] A schematic diagram showing a touch electrode structure according to another embodiment of the present disclosure. [Fig. 6] An enlarged view showing the electrode group according to Fig. 5. [FIG. 7] A schematic diagram of a capacitive touch system according to an embodiment of the present disclosure.

10: substrate

20: connection line

30: first electrode

40: second electrode

400-406: Electrode group

X1-X5: second electrode series

Y1-Y8: first electrode series

Claims (6)

A touch electrode structure includes: a substrate; a plurality of first electrode series formed on a first surface of the substrate along a first direction, and each of the first electrode series includes a plurality of first electrodes A plurality of second electrode series are formed on the first surface of the substrate along a second direction, each of the second electrode series includes a plurality of second electrodes; and at least one connecting line is formed in the On a second surface of the substrate, each of the second electrode series includes a plurality of electrode groups, each of the electrode groups includes two second electrodes, and the two second electrodes are on the first surface of the substrate The upper part is electrically connected, and the adjacent electrode groups are electrically connected through the at least one connecting wire, wherein the second electrode of each of the electrode groups is rectangular and electrically connected through a connecting portion between the second electrodes connection. A touch electrode structure includes: a substrate; a plurality of first electrode series formed on a first surface of the substrate along a first direction, and each of the first electrode series includes a plurality of first electrodes A plurality of second electrode series are formed on the first surface of the substrate along a second direction, each of the second electrode series includes a plurality of second electrodes; and at least one connecting line is formed in the On the second surface of one of the substrates, Wherein each of the second electrode series includes a plurality of electrode groups, each of the electrode groups includes two second electrodes, and the two second electrodes are electrically connected on the first surface of the substrate and are in phase The adjacent electrode groups are electrically connected by the at least one connecting wire, wherein the second electrode of each of the electrode groups includes: a first triangle portion; a second triangle portion; and a connecting portion, wherein the first triangle portion The shape of the portion is opposite to the shape of the second triangular portion, the connecting portion is a straight line, and the first triangular portion and the second triangular portion are electrically connected through the connecting portion. A touch electrode structure includes: a substrate; a plurality of first electrode series formed on a first surface of the substrate along a first direction, and each of the first electrode series includes a plurality of first electrodes A plurality of second electrode series are formed on the first surface of the substrate along a second direction, each of the second electrode series includes a plurality of second electrodes; and at least one connecting line is formed in the On a second surface of the substrate, each of the second electrode series includes a plurality of electrode groups, each of the electrode groups includes two second electrodes, and the two second electrodes are on the first surface of the substrate The upper part is electrically connected, and adjacent electrode groups are electrically connected through the at least one connecting line, wherein the second electrode of each of the electrode groups includes: a first triangle part; a second triangle part; and A connecting portion, wherein the shape of the first triangle portion is opposite to the shape of the second triangle portion, the connecting portion is a rhombus, and the first triangle portion and the second triangle portion are electrically connected through the connecting portion. A capacitive touch system includes: a touch panel, including a touch electrode structure, the touch electrode structure includes: a substrate; a plurality of first electrode series formed on one of the substrates along a first direction On the first surface, each of the first electrode series includes a plurality of first electrodes; a plurality of second electrode series are formed on the first surface of the substrate along a second direction, and each of the first electrode series The two electrode series include a plurality of second electrodes; and at least one connecting line is formed on a second surface of the substrate, wherein each of the second electrode series includes a plurality of electrode groups, and each of the electrode groups includes two A second electrode, the two second electrodes are electrically connected on the first surface of the substrate, and adjacent electrode groups are electrically connected through the at least one connecting line; and a touch detection unit, It is electrically connected to the touch electrode structure and used to detect a touch signal or a floating signal on the touch electrode structure, wherein the second electrode of each of the electrode groups is rectangular and passes between the second electrodes One of the connecting parts is electrically connected. A capacitive touch system includes: a touch panel, including a touch electrode structure, the touch electrode structure includes: a substrate; a plurality of first electrode series formed on one of the substrates along a first direction On the first surface, each of the first electrode series includes a plurality of first electrodes; A plurality of second electrode series are formed on the first surface of the substrate along a second direction, each of the second electrode series includes a plurality of second electrodes; and at least one connection line is formed on the substrate On a second surface, each of the second electrode series includes a plurality of electrode groups, each of the electrode groups includes two second electrodes, and the two second electrodes are on the first surface of the substrate Are electrically connected, and adjacent electrode groups are electrically connected through the at least one connecting wire; and a touch detection unit is electrically connected to the touch electrode structure and used for detecting one of the touch electrode structures A touch signal or a floating signal, wherein the second electrode of each of the electrode groups includes: a first triangular part; a second triangular part; and a connecting part, wherein the shape of the first triangular part is the same as that of the second triangular part. The shape of the triangular portion is opposite, the connecting portion is a straight line, and the first triangular portion and the second triangular portion are electrically connected through the connecting portion. A capacitive touch system includes: a touch panel, including a touch electrode structure, the touch electrode structure includes: a substrate; a plurality of first electrode series formed on one of the substrates along a first direction On the first surface, each of the first electrode series includes a plurality of first electrodes; a plurality of second electrode series are formed on the first surface of the substrate along a second direction, and each of the first electrode series The two electrode series includes a plurality of second electrodes; and at least one connection line is formed on a second surface of the substrate, Wherein each of the second electrode series includes a plurality of electrode groups, each of the electrode groups includes two second electrodes, and the two second electrodes are electrically connected on the first surface of the substrate and are in phase The adjacent electrode groups are electrically connected through the at least one connecting wire; and a touch detection unit is electrically connected to the touch electrode structure and used for detecting a touch signal or a floating on the touch electrode structure Signal, wherein the second electrode of each of the electrode groups includes: a first triangular portion; a second triangular portion; and a connecting portion, wherein the shape of the first triangular portion is opposite to the shape of the second triangular portion, The connecting portion has a rhombus shape, and the first triangular portion and the second triangular portion are electrically connected through the connecting portion.

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